Coil-forming machine



Sept'. 13, 1927. ,229

- L. COLE COIL FORMING MACHINE Filed April 50. 1926 5 Sheets-Sheet 1 Ai'ius.

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Sept. 13, 1927.

L. A. COLE COIL FORMING MACHINE Filed April 30. 19 2s 5 Sheets-Sheet 2 Se t. 13, 1927. 1,642, 9

L. A. COLE.

COIL FORMING MACHINE Filed April 30. 1926 5 Sheets- Sheet 3 Sept. 13, 1927..

l A. COLE COIL FORMING MACHINE Filed April 50. 1926 5 Sheets-Sheet 4 Inzrenfac LA .5015,

Sept. 13, 1927.

L. A. COLE COIL FORMING MACHI NE 5 Shets-Sheet 5 Filed April 30. 1926 Patented Sept. 13, 1927.

LORNE A. COLE, or BRANTFORD, on'rnn o, CANADA.

COIL-FORMING MACHINE.

Application filed April 30, 1926. Serial No. 105,857.

My invention relates to improvements in coil forming machines and the object of the invention is to devise in a machine of the type disclosed in my United States applica- 'tion Serial #22146, filed April th, 1925, means for imparting to the sides of the coil the necessary angular set to permit of their easy entrance into the radial slots of a stator or rotor and their proper fitting therein 10 without stress obviating any danger of chating and liability to burn the machine out, todevise simple-means for holding the loop end forming rods so that they will be locat ed at. the required distance at each side of the centre of the machine prior to the spreading operation, and to provide means for more definitely gripping the loop sides at the point of bend in each coil side so that they will definitely remain in the same 520 plane during bending in the spreading operation, and it consists essentially'ot' the arrangement and construction of parts as hereinafter more particularly explained.

Fig. 1 is a perspective view of my machine shown in' the winding position.

Fig. 2 is a similar view co-Figure 1 showing the parts in the spreading position, but inverted for the purpose of more clearly illustrating the parts. i

30 Fig. 3 is a longitudinal sectional view through my machine showing theparts in the spread rig position and looking from the opposite side to that illustrated inFig. 2.

Fig. 4 is a similar view to Figure 3 show- ?5 ing the parts in the-initial position they assume during the setting operation in full lines and the final position in dotted lines.

.ig. 5 is a transverse sectional view through my machine taken immcdiatelyin front of the stationary transverse member oi my machine.

Fig.6 is a transverse sectional viewtaken through the longitudinal centre of the movable transverse member-of my machine.

Fig. 7 is a sectional detail view extending longitudinally of the machine and through the centre of the loop side holding, jaws showing the parts in the position they assume during the loop forming operation.

Fig. 8 is a similar view to Figure7 showing the parts in the position they assume after the soreadin oieration and taken at' oneside of the loop holding aws.

Fig. 9 is a detail view of the loop from which the coil is formed.

Fig. 10 is a detail view of the loop after the spreading operation is completed to form the coil.

F i-g. llis a perspective detail of one of the coil forming jaws.

Fig. 11 is a perspective detail of the gripping members.

12 is a detail of the saddle plate. coacting with the jaws illustrated in Figure 11.

Fig. 13 is a perspective detail of thelead holder whereby the lead end of the wire forming the loop is secured in a stationary position to one of the transverse members 4 or 41. Y

Fig. 14 is a sectional view through Figure 13.

Fig. 15 is asectional view through one of the adjustable stops? 1 or 72. i

.F 16 is a sectional detail through the bar 78 and member 4 showing the key 81 locking the same together.

F 17 is a diagrammatic view showing the position assumed during the settingoperation.

In the drawings like characters of refer? ence indicate corresponding parts in each figure.

It might be first pointed out that in forming a coil the wire is wound into what is known as a loop and such loop does not become known as a coiluntil it is spread as hereinafter described.

1 indicates a shaft carrying the main sup porting member 2 in the form of a bar prowided with a longitudinallyextending open ended s1ot3, the opposing e ges of which are provided withlongitudinally extending guid'eways 3 4 is a transverse bar member which is secured to the supporting memher 2 at point intermediatelv of its length by means of bolts 5 or other securing means. The member 4 is provided with longitudinal slots 4* and 4 extending from each side of the centre thereof. 6 and 7' are jaw members secured to the transverse bar member 4. Each jaw member 6 and 7 is formed with a plate like portion, see Fig. 11, provided with a longitudinal slot 6 through which a securing bolt- 8 extends.

8 is a saddle plate which straddles the transverse member 4 and is provided in each end edge with a recess 8 into which the body of th'e jaw member 6 or 7 fits. 8 iis an orifice ,in the centre of the saddle plate through which the boltB also extends. The bolt 8 is provided with a rectangular block like head 9 through which extends an internally threaded orifice 9 for a purpose which will hereinafter appear.

It will be noted that a aw member 6 or 7 and saddle plate 8 are secured together by the bolt 8 passing through the longitudinal slot 4 or 4 so as to slide longitudinally of the transverse member 4 as one unit.

The body portions of the jaw members 6 and 7 are provided with out-turned portions 10 extending partially across the jaw member 6 and provided with an open ended slot 10*. The remaining portion of the body portion is extended horizontally as indicated at 10 so as to form a support for the loop at the point of bend as it is spread into the coil.

11 and 12 are bearing ends carried by the transverse member 4. 13 is a spindle pro vided at one end with a right hand thread and at the other end with a left hand thread which is journalled in the bearing ends 11 and 12 and held therein from longitudinal movement, such spindle extending longitudinally of the transverse member 4 and passing through the internally threaded orifice 9 of the heads 9 so that the right hand thread engages with one head and the left hand thread with the other head, the spindle being provided at its ends with a squared portion 14 to permit of its engagement with a wrench, By turning the spindle it will be readily seen that the jaw members 6 and 7 may be simultaneously adjusted to any position at an equal distance from the centre of the machine according to the length of the coil side desired to be formed.

In order to hold the coil side within the jaw members 6 and 7 I provide the following device.

15 are a pair of standard members carried by the supporting member 2 adjacent to the transverse member 4. 16 is a bar member extending freely between the standard memhere 15. 17 is a rod formed integral with the inner end of the bar member 16 and extending transversely of the machine. 18 are movable gripping members clamped upon the rod 17 and provided. in its lower edge with a transverse notch 18 into which the small portion 18 of the out-turned portion 10 of the jaw members 6 and 7 fit as clearly indicated in Figure 5.

In order to support the outer end of the bar 16 I provide a set screw 19 the head of which bears upon the shaft 1. By adjusting the set screw 19 the bar 16 may be adjusted to a horizontal position according to the height of the coil desired to be formed by the machine.

20 is a clamping cam pivotally mounted screw 19 against the shaft 1 and the gripping members 18 into contact with the upper face of the wound loop side.

23 and 24 are a pair of rods extending longitudinally of the machine and at each a pivot bolt 31 extends for connecting the parts together.

32 is a tension spring secured at one end to a pivot bolt 31 and at its opposite end to the supporting member 2. 33 and 34 are blocks also slidably carried upon the rods 23 and 24 in proximity to the opposite ends thereof. 35 and 36 are rods extending through the blocks 33 and 34 and secured therein by set screws 37 their converging ends being con nected together by a pivot bolt 38 similarly to the pivot connection of the rods 27 and 28. 39 is a tension spring connected at its outer end to the pivot bolt 38. 40 is a slide bar fitting within the open ended slot 3 of the supporting member 2 so as to be slidable longitudinally therein. The lower end of the spring 39 is secured to a bolt 39 extending from the slide bar 40 and through the slot of the bar 82. 41 is a transverse bar member secured to the slide bar 40 so as to be movable therewith. The transverse bar member 41 is provided with longitudinal slots 42 and 43.

44 and 45 are jaw members secured to the transverse bar member 41 in a similar manner to the members 6 and 7. The jaw members 44 and 45 are oppositely set to the jaw members 6 and 7 as will be clearly seen on referring to Figures 7 and 8 so as to receive the opposite parallel side portion of the loop. The jaw members 44 and 45 are also simultaneously ad usted by a screw spindle 46 in a similar manner to that described in connection with the aw members 6 and 7 and screw spindle 13.

47 and 48 are bolts which extend through the slide bar 40, the bolt 47 being provided with a pair of washers 49 and 50 over hanging the edges of the slide bar so as to engage the supporting member 2 at each side of the slide bar. The bolt 48 is provided with a washer 51 also over hanging the slide bar 40 so as to bear upon the upper face of the supporting member 2 when the device is in the spreading position and aft-er the bolt 47 and washer 49 have passed the supporting member 2.

52 and 53 are blocks. secured in a stationary position upon the rods 23 and 24. A block 52 is slidably The blocks 53 are carried on each rod '23 and24and is connected to the block 53by-means of the spring pressed latch 55 carried by the block-53 an provided with a screw 56, the head of which engages a groove or indentation 57 formed in a block52; By adjusting the screw56 the blocks 52 and 53 may be spaced apart according-to the thickness of the loop to be wound. It willbe noted that the *blocks'f52' extending beneaththe transverse member 4.

62 and 163 are orifices formed in the members60 and 61 and 64 are projections extending upward from the member 61 and adapted to fit within the longitudinal slot 4* of the member 4 so as to hold the member 61 definitely in a rightangular position thereto. 65 is ,a'n.open ended-slot formed in the member- 61 directly above a-projecting rib'66 on the member 60 to form grippingmeans for the lead endof the wire extending therethrough. 67 "is a saddle member extending over the transversemember .4, and 68 is a bolt extending through the. orifices t 62 and 63 and theorifice 6,8*'of the-saddle member 67. 69 is a butterfly nut by which themembers 60 and 61 are drawn together tocarry the rib 66 into contact withthe lower face of the lead wire and the portionsof the member 61 .forming. the s1ot 65 against the upper face of the'lead wire.

In order to-adjust the plates L 60 and ,61 ,to

a parallel, position in accordancev with the I provide a set screw 7 0 extending throng the angle member 60 against the lower face of the angle member 61, the, set screw 70 being provided with a lock nut 70?. By this ni'eans the lead end of the wire is first clamped to the transversemember4. Before winding the loop it is first necesthickness of the wires to'be gripped thereby sary to lock tlierods 23and 24 in a stationary position accurately Tcentered from .each side of the longitudinalcentre of the machine. In orderto dothis I have devised the following device.

Tl and 7 2 are ad ustable stops. 6 Each stop .71-'and-72 consists .of a- -knurled nut 74 engaging the-thread of the spindle '13. '75 and 176 i r are -bracket :members :extending at each .side of theznut 7.4and secured-- together as indicated at 7 7 the extremity of the bracket '7 5 being turned inward at'75 so "as to receive the blocks53 of the rods 23 and24. By this means the distance apart of the blocks-53 andlthe rods 23 and 24 extending therethrough' are definitely set and centered at each side of the longitudinal centre of the machine. In..order to hold the rods 23 and 24 fromjinward movement during the wind ing of the loop Iprovide a longitudinally slottedbar 7 8'secured to the block 53'of-the rod 23 and-provided at its opposite end 'with a recessed plate 7 9 into which "the block-'53 of-the rod 24- is adapted to fit when the-rods 23 and, 24 are intheir spread apart position. The plate? 9 ,is adjustablysecured to the bar '78 by means of-bolts ,80 extendingdownward from the slot of the bar 78 wherebytheplate 70 is adjustedaccording to the'length ofthe loop desired to be wound.

When in the winding position the clamp: in; members 18,, are removed from the jaws -6 and? and the bar 16;drawn backwardinto position to 'carryvthe rod'17 into close proximity" with the standard members *1-5jto; a corresponding position .to' thatiindicated in Figure lot the drawing where the clamping inembersicorresponding to the jaws 44 and 45 are drawn backxto the winding position. The end 22 of thecam 20'is forced downward against the-bar 16 to lock it in the withdrawn position... The shaft 1 is'then rotated so as torotate the whole device and 'asthe device rotates the wire passes from its point' of attachment into the jaws 6'and 7 around. the

rod 24 and then through the jaws 45,and 44 and then around the rod member 23 and,then back into ,the jaws 6" and 7 ,[the winding operation continuing until theloopj iscom- P e'd:

"Itjmay be stated that during the winding operation that a'key 81jconnects th'e slotted bar. 7 8,0201 the transverse member 4 thereby securely hjolding the'block .53 between the recessed member 79 carried by the "bar 78 and h transver membe .,After the winding, operation the cam membe fl iisthrown a rt ca p t so as to free thebar member 16 whichis then moved forward so that the 'gripping I members 18 are carried -to the position shown in Figure-2sothat they bear upon theupperfface-of the coil sideand engage with the 'aws 6 and 7 as hereinbeforedescribed. T ecam 20 is thenthrown'down -to lockithe parts imposition and therebysecure the c'oil side from movement. It will of f'coursebe understood that jasimi lar op- J erationtakes placeonthe opposite side of.

the machine sofl'that Q theother coil side is similarly zlocated in the jaws :44 and '45.

f After the windingoperation is complete thekey is removed by simply turning it {to a pos tion at .right'anglesftothe position .shown' and. passing it I upward through the slots ofith'e transverse' member 4 and-bar '78.

required After the key is removed the bar 78 is slightly raised at its free end so as to clear the block .38 out of engagement therewith. The natural. tension of the wound loop will. then draw the block clear of the member 79. The bar is then drawn longitudinally in the direction of arrow see Figure 1 to the distance limited by mechanism which will hereina' ter be described.

By the moving oftlieslide bar40 the jaw members 43, and 4st are drawn apart from the jaw. membersti and 7. As the slide member 40 is drawn in the direction ofarrow the rods'28 and 2a are also carried in the same direction by reason of the coil ends inserted between; the blocks and 58. By this means the coil is spread from the looptorm shown in. Fignre 9 to the form shown in Figure 10.

In order to limit the spread of the coil 1 provide the following mechanism.

82'is a slotted bar extending parallel with and, above the slide bar $0 in the inverted position shown in Figure 2. The inner end of the bar 82 is provided with a downward extension 83 extendinginto the open ended slot 3 of the bar support 2 and with a further horizontal extension 8% provided with a pivot pin,85 projecting into the ,n'uideway 3" and forming a pivot support for the bar 82. i The bar 82 is connected to the slide har lO by means of a bolt 86. 87 is a nut set upon the bolt 86to permit of a certain amount of movement between the bar 82 and slide bar i0 when operated as hereinafter described.

88'is a bolt extending from the slide bar l0 through the slot of the bar 82 provided with a nut and washer 89 on one side of the bar 82 and with an enlargement 90'011 the opposite side of the bar so as to permit of the tree sliding movement of the slide bar and a certain amount of tilting movement between the nut and washer89 and the enlargementQO. v

91 is a notch formed in the extremity of the portion 8t. 92 is a link provided at its inner endvith an inwardly oilset portion 93 terminating in an inturned portion 94; extending into the notch 9i and provided with an orifice 95 through which the pivot pin 85 hereinbefore described extends thereby pivotally connecting theinner end ofthe link 92 to the inner end of the extension 84.

-The opposite end of the link is provided between the inner edge of the upward projection98 and the shoulder 97 so that when the slide bar 40 is drawn in the direction of arrow to spreadthe coil when drawn to its limit carries the projection 98into engage- T ment with the transverse pin 108and permits the shoulder 97 to drop so as to engage with the inner face of the bracket 99 and thereby lock the link from movement in either direction and consequently the slot: ted bar 82 thereby positively locating the pivot pin approximately on the imaginary center line of the spread coil as indicated by the dash line --a:, Fig. 9. litter the mechanism. has assumed the above pe 5 sition thesf bar 10 is drawn int-thei out as to con note the spread OftllQ coil so that the corresponding side of the coil. is an, equal distance from the. pivot pin to the opposite side of the coil side this distance being limited by the mechanism 1 will now describe.

ills a bed provided w; secured in a staionary position inthe slot ot'the .lllt a link pivoted at 107 to the slice bar #10. The free end of the link 106 is provid ...-d with a recess 108 so as to fit over the top ofthe bolt head 105. It will al. 1 be noted that the lower edge of link 1% is 'i'clined so as to readily permit the link l'la. ing over the head of the bolt l05as the slide bar 40 is drawn outward.

After thejiirst coil is spread the required distance the Eli 99 and the bolt 10% are set'in such position that the spreading of the coil is limited to the required distance apart oiithe coil sides and at the same time locating'the pivot pin approximately on the centre line x a' of the spread coil. It will be noted when the slide 4 d0 is drawn to the position above ClGSClllJBi'l that the washers and 50 are caried to a posi tion' clear of the SUPUQYtiD member 2. After the spreading o1 has completed as above d scribed". provide tor the setting oper sary that certain parts of removed. in order to do 39 and 32 are'disconnec bolts 4-8 and 31, the l" 25 and 26 togetner l and 27 and 28 are removed 23'and 24-. The latch is Z the blochs52 slide aw vii-01n permitting the blocks to; rods 23 and 2% to be moved in wide part of the coil so that can be passed longitudinally through the coil so as to beremoved therefrom, v

After the toiegoingpaits have bee n'removed'the lidebar eld is throi'vnupward first assuming 'the positio'n shown-in full lines inlfi ure "tand then the dotted posi-.

"h a head bra-e he to the coils directly after the spreading and the rotor 13 with slots C and C to which mycoil is to be applied in dotted lines. Vhen in the full line position the coil side A forms the pivot point around which the swinging movement takesplace, the coil side A as suming the dotted position A indicated in Figure 17. During this movement the slotted bar 82 at a point adjacent to the inner end or" the slide bar 40 iscarried upward towards such slide bar, this movement being limited by the nut 87 on the bolt 86. This operation gives the required angular set to the coil side so that its final position will be radial to the centre of the stator or rotor to which it is to be applied, otherwise, when the coil is set to the rotor the coil side A would assume the incorrect position D so that it could not enter the slot C, It will, therefore, be seen a correction of set as indicated at A is first necessary. \Vhen this set has been obtained the slide bar 40 is thrown u to the positionshown by dotted lines in F igure 4.' This movement pivoting around the centre formed by the pivot pin v 94 thereby carrying the coil side upward off thesuppo'rting bar 2'so that in the final position the two coil sides have the correct angular relation to fit the slots C perfectly.

It may be pointed out that when the spread coil is set to fit the rotor or stator that the converging portions of the coil sidev extending between the parallel portions of the coil sides and the coil ends take a curve automatically corresponding to the curve required to fit the periphery of the rotor or stator as clearly shown in Figure 17.

In order to limit the return movement of the mechanism from the spreading position to the loop winding position provide stops X and X the stop X being provided with a set screw X so as to control the position to which the movable member 41 is returned in relation to the stationary member 4 and according to the thickness of the loop desired to be wound'by the mechanism.

After the coil assumes the final shape with the machine in the dotted line position Fig ure 4, the coil side in jaws 44 and 45 is removed by the operating of cam 20 on movable transverse' member 41 and withdrawal of blocks 18 from said jaws. Then by removing pm 103 the slide bar 40, bar 82, link 92 andattached partsare removed from I the machine. Thecoi'lis then easily removed from the machine by operating cam 20 etc, ofstationary traverse member 4;

hat I claim as my invention is: 1. Ina coil forming machine, thejcombination with the mainfsupport," a stationary e ber 'e djby th a s p erpping means carried by such stationary member adapted to one side of'awouiid loop, a movable mechanism slidablycarried right angles to the stationary member and by which the movable member is Carried, and gripping means carried by the movable member adapted to grip the other side of the coil, of a stop link pivotally connected to the movable mechanism, a coacting stop carried by the'support adjacent the stationary member, a stop link pivotally mounted atone end to move with the movable meme ber, and asto coacting with the free end of the stop lin' when the movable member is moved tothe limit of its movement, 2. In a coil forming machine,the combination with the spreading mechanism including the means for separately gripping each coil side, of means for first imparting an angular set to one side of the coil while the other is gripped in a stationary psi tio'n, and means for swinging the set 'sidbof the coil upward and inward toward the stationary side until both coil sides are radial to a common centre. i

3. In a coil forming machine, the combination with the stationary support provided with a longitudinally extending guideway, of a stationary transverse member carried by the support, gripping means carried by the stationary member for gripping one coil side, a slide bar slidably carried within the guideway, a movable transverse member carried by the slide bar, gripping means carried by the movable member for gripping the other side of the coil, a bar carried by the aforesaid slide bar to move longitudinally thereof and extending at its inner end into the guideway, a stop linl; pivotally connected to such inner end, a stop carried by the supporting member with which the stop link engages to lock it from movement in either direction when the movable member is carried towards the coil s reading position, a link pivotally carrie by $1. 9 slide bar having a receiving recess in its free end, and a stop projection extending from the bar carried by the slide bar and withwhich saidrecess engages when the movable transadapted to grip the other side of thecoil',

ful rum Pin slide l Withiethe uid way, a barmemberpivotal'ly mounted the i is varied.

fulcrum pin, a slidable connection between such bar member and the slide bar, and stop means adapted to locate the fulcrum pin centrally between the coil sides when the slide bar is drawn outward to the coil spreading position.

5. In a coil forming machine, the combination with the main support having a longitudinalslideway, a stationary bar member carried by the main support transver ely thereof, a movable bar member also carried bythe main support and extending transrers'ely thereof, gripping ,jaws carried by the stationary and transverse bar member dapted to engage the coil sides at a distance from the coil ends, tongue members forming part of thegripping jaws and adapted to extend beneath the coil side at the point of bend and at the outer side of the gripping jaws, means for gripping the coil sides over the point of'bend, and movable means supporting the coil ends during the spreading operation.

6. In a coil forming machine, the combination with the main support provided with a longitudinal guideway, a transverse stationary bar member carried by'the main support, a movable transverse bar member also carried by the main support, gripping means carried by the stationary and movable transverse bar members to separately grip each coil side, and means for support ing the coil ends during the spreading operation comprising parallel rods extending at right angles to the aforesa'd transverse members and around which the coil ends pass, a stationary block mounted upon each rod at one side of each coil end, a movable block carried by each rod at the opposite side of each coil end, and means for detachably connecting the movable and stationary blocks together.

7. In a coil forming machine, the combination with the main support provided with a longitudinal guideway. a transverse stationary bar member carried by the main support, a movable transverse bar member also carried by the main support, gripping means carried by the stationary and movable transverse bar members to separately grip each coil side. and means for supporting the coil ends during the spreading operation comprising parallel rods extending at right angles to the aforesaid transverse members and around which the coil ends pass, a stationarybloclr mounted upon each rod at oneside' of each coil end, a movable block carried by-each' red at the opposite side ofieach coil end, adjustable means for detachably connecting the movable and stationary blocks. together whereby the distance apart-', of they stationary and movable blocks 1 ,8. la ,a coil. forming ,inachine, ,the com:

bination with the main support provided with a longitudinal gnideway, a transverse stationary bar member carried by the main support, a movable transverse bar member also carried by the main support, gripping means carried by the stationary and movable transverse bar members to separately grip each coil side, and means for supporting the coil ends during the spreading operation comprising parallel rods extending at right angles to the aforesaid transverse members and around which the coil ends pass, a stationary block mounted upon each rod at one side of each coil end, a movable block carried by each rod at the opposite side of each coil end, and a spring latching finger carried by each stationary block and adapted to engage the movable block to hold it in position in relation to the stationary block.

9. In a coil forming machine, the combination with the main support provided with a longitudinal guideway, a transverse stationary bar member carried by the main support, a movable transverse bar member also carried by the main support, grip-ping means carried by the stationary and movable transverse bar members to separately grip each coil side, and means for supporting the coil ends during the spreading op eration comprising parallel rods extending at right angles to the aforesaid transverse members and around which the coil ends pass, a stationary block mounted upon each rod at one side of each coil end, a movable block carried by each rod at the opposite side of each coil end, and a spring latching linger provided with a set screw at its outer end, the head of which is adapted to engage the movable block to hold it in the adjusted position in relation to the stationary block.

10. In a coil forming machine adapted to form a diamond shaped coil, the combination with the movable transverse bars, of gripping members carried by the bars and each formed by a plate having an upturned. inner end portion forming a vertical slot between which and the transverse bar the coil side is adapted to extend, an inwardly extending horizontal tongue portion extending at one side of such upturned portions and adapted to support that portion of the coil sideat the point of bend, and a movable gripping member coacting with each of the aforesaid members and comprising a block having an open ended slot forming depending. portions at each side of the slot, one portion fitting into the slot of the gripping members and the transverse bar and upon thecoil side, and the other portion upon the coilside at the point of bend directly above the horizontal tongue. i LORNElA, COLE; 

